Java 获取系统各项参数

介绍

OSHI是Java的免费的基于JNA的（本机）操作系统和硬件信息库。它不需要安装任何其他本机库，并且旨在提供一种跨平台的实现来检索系统信息，例如OS版本，进程，内存和CPU使用率，磁盘和分区，设备，传感器等。

oshi支持的功能

• 计算机系统和固件，底板
• 操作系统和版本/内部版本
• 物理（核心）和逻辑（超线程）CPU
• 系统和每个处理器的负载百分比和滴答计数器
• CPU正常运行时间，进程和线程
• 进程正常运行时间，CPU，内存使用率
• 已使用/可用的物理和虚拟内存
• 挂载的文件系统（类型，可用空间和总空间）
• 磁盘驱动器（型号，序列号，大小）和分区
• 网络接口（IP，带宽输入/输出）
• 电池状态（电量百分比，剩余时间）
• 连接的显示器（带有EDID信息）
• USB设备
• 传感器（温度，风扇速度，电压）

API

具体实现

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 获取系统信息 -->
<dependency>
    <groupId>com.github.oshi</groupId>
    <artifactId>oshi-core</artifactId>
    <version>5.3.6</version>
</dependency>
<!--常用工具类 -->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-lang3</artifactId>
</dependency>
<!-- 阿里JSON解析器 -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.47</version>
</dependency>
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <optional>true</optional>
</dependency>

工具类

public class SystemInfoUtils {
    private static final int OSHI_WAIT_SECOND = 1000;
    private static SystemInfo systemInfo = new SystemInfo();
    private static HardwareAbstractionLayer hardware = systemInfo.getHardware();
    private static OperatingSystem operatingSystem = systemInfo.getOperatingSystem();

    public static JSONObject getCpuInfo() {
        JSONObject cpuInfo = new JSONObject();
        CentralProcessor processor = hardware.getProcessor();
        // CPU信息
        long[] prevTicks = processor.getSystemCpuLoadTicks();
        Util.sleep(OSHI_WAIT_SECOND);
        long[] ticks = processor.getSystemCpuLoadTicks();
        long nice = ticks[CentralProcessor.TickType.NICE.getIndex()] - prevTicks[CentralProcessor.TickType.NICE.getIndex()];
        long irq = ticks[CentralProcessor.TickType.IRQ.getIndex()] - prevTicks[CentralProcessor.TickType.IRQ.getIndex()];
        long softirq = ticks[CentralProcessor.TickType.SOFTIRQ.getIndex()] - prevTicks[CentralProcessor.TickType.SOFTIRQ.getIndex()];
        long steal = ticks[CentralProcessor.TickType.STEAL.getIndex()] - prevTicks[CentralProcessor.TickType.STEAL.getIndex()];
        long cSys = ticks[CentralProcessor.TickType.SYSTEM.getIndex()] - prevTicks[CentralProcessor.TickType.SYSTEM.getIndex()];
        long user = ticks[CentralProcessor.TickType.USER.getIndex()] - prevTicks[CentralProcessor.TickType.USER.getIndex()];
        long iowait = ticks[CentralProcessor.TickType.IOWAIT.getIndex()] - prevTicks[CentralProcessor.TickType.IOWAIT.getIndex()];
        long idle = ticks[CentralProcessor.TickType.IDLE.getIndex()] - prevTicks[CentralProcessor.TickType.IDLE.getIndex()];
        long totalCpu = user + nice + cSys + idle + iowait + irq + softirq + steal;
        //cpu核数
        cpuInfo.put("cpuNum", processor.getLogicalProcessorCount());
        //cpu系统使用率
        cpuInfo.put("cSys", new DecimalFormat("#.##%").format(cSys * 1.0 / totalCpu));
        //cpu用户使用率
        cpuInfo.put("user", new DecimalFormat("#.##%").format(user * 1.0 / totalCpu));
        //cpu当前等待率
        cpuInfo.put("iowait", new DecimalFormat("#.##%").format(iowait * 1.0 / totalCpu));
        //cpu当前使用率
        cpuInfo.put("idle", new DecimalFormat("#.##%").format(1.0 - (idle * 1.0 / totalCpu)));

        //cpu当前温度
        cpuInfo.put("temp",hardware.getSensors().getCpuTemperature());


        return cpuInfo;
    }

    /**
     * 系统jvm信息
     */
    public static JSONObject getJvmInfo() {
        JSONObject cpuInfo = new JSONObject();
        Properties props = System.getProperties();
        Runtime runtime = Runtime.getRuntime();
        long jvmTotalMemoryByte = runtime.totalMemory();
        long freeMemoryByte = runtime.freeMemory();
        //jvm总内存
        cpuInfo.put("total", formatByte(runtime.totalMemory()));
        //空闲空间
        cpuInfo.put("free", formatByte(runtime.freeMemory()));
        //jvm最大可申请
        cpuInfo.put("max", formatByte(runtime.maxMemory()));
        //vm已使用内存
        cpuInfo.put("user", formatByte(jvmTotalMemoryByte - freeMemoryByte));
        //jvm内存使用率
        cpuInfo.put("usageRate", new DecimalFormat("#.##%").format((jvmTotalMemoryByte - freeMemoryByte) * 1.0 / jvmTotalMemoryByte));
        //jdk版本
        cpuInfo.put("jdkVersion", props.getProperty("java.version"));
        //jdk路径
        cpuInfo.put("jdkHome", props.getProperty("java.home"));
        return cpuInfo;
    }

    /**
     * 系统内存信息
     */
    public static JSONObject getMemInfo() {
        JSONObject cpuInfo = new JSONObject();
        GlobalMemory memory = systemInfo.getHardware().getMemory();
        //总内存
        long totalByte = memory.getTotal();
        //剩余
        long acaliableByte = memory.getAvailable();
        //总内存
        cpuInfo.put("total", formatByte(totalByte));
        //使用
        cpuInfo.put("used", formatByte(totalByte - acaliableByte));
        //剩余内存
        cpuInfo.put("free", formatByte(acaliableByte));
        //使用率
        cpuInfo.put("usageRate", new DecimalFormat("#.##%").format((totalByte - acaliableByte) * 1.0 / totalByte));
        return cpuInfo;
    }

    /**
     * 系统盘符信息
     */
    public static JSONArray getSysFileInfo() {
        JSONObject cpuInfo;
        JSONArray sysFiles = new JSONArray();
        FileSystem fileSystem = operatingSystem.getFileSystem();
        List<OSFileStore> fsArray = fileSystem.getFileStores();
        for (OSFileStore fs : fsArray) {
            cpuInfo = new JSONObject();
            //盘符路径
            cpuInfo.put("dirName", fs.getMount());
            //盘符类型
            cpuInfo.put("sysTypeName", fs.getType());
            //文件类型
            cpuInfo.put("typeName", fs.getName());
            //总大小
            cpuInfo.put("total", formatByte(fs.getTotalSpace()));
            //剩余大小
            cpuInfo.put("free", formatByte(fs.getUsableSpace()));
            //已经使用量
            cpuInfo.put("used", formatByte(fs.getTotalSpace() - fs.getUsableSpace()));
            if (fs.getTotalSpace() == 0) {
                //资源的使用率
                cpuInfo.put("usage", 0);
            } else {
                cpuInfo.put("usage",new DecimalFormat("#.##%").format((fs.getTotalSpace() - fs.getUsableSpace()) * 1.0 / fs.getTotalSpace()));
            }
            sysFiles.add(cpuInfo);
        }
        return sysFiles;
    }

    /**
     * 系统信息
     */
    public static JSONObject getSysInfo() throws UnknownHostException {
        JSONObject cpuInfo = new JSONObject();
        Properties props = System.getProperties();
        //操作系统名
        cpuInfo.put("osName", props.getProperty("os.name"));
        //系统架构
        cpuInfo.put("osArch", props.getProperty("os.arch"));
        //服务器名称
        cpuInfo.put("computerName", InetAddress.getLocalHost().getHostName());
        //服务器Ip
        cpuInfo.put("computerIp", InetAddress.getLocalHost().getHostAddress());
        //服务器Mac地址
        cpuInfo.put("computerMac",getMacAddr());
        //项目路径
        cpuInfo.put("userDir", props.getProperty("user.dir"));
        return cpuInfo;
    }

    /**
     * 获取系统的Mac地址
     */
    public static String getMacAddr() throws UnknownHostException {
        String hostAddress = InetAddress.getLocalHost().getHostAddress();
        SystemInfo systemInfo = new SystemInfo();
        List<Object> list = new ArrayList<>();
        HardwareAbstractionLayer hardware = systemInfo.getHardware();
        List<NetworkIF> networkIFs = hardware.getNetworkIFs();
        to:for (NetworkIF networkIF : networkIFs) {
            String[] iPv4addr = networkIF.getIPv4addr();
            for (String s : iPv4addr) {
                if (hostAddress.equals(s)) {
                    list.add(networkIF);
                    break to;
                }
            }
        }
        NetworkIF networkIF = (NetworkIF) list.get(0);
        String macAddr = networkIF.getMacaddr();
        return macAddr;
    }

    /**
     * 所有系统信息
     */
    public static JSONObject getInfo() throws UnknownHostException {
        JSONObject info = new JSONObject();
        info.put("cpuInfo", getCpuInfo());
        info.put("jvmInfo", getJvmInfo());
        info.put("memInfo", getMemInfo());
        info.put("sysInfo", getSysInfo());
        info.put("sysFileInfo", getSysFileInfo());
        return info;
    }

    /**
     * 单位转换
     */
    private static String formatByte(long byteNumber) {
        //换算单位
        double FORMAT = 1024.0;
        double kbNumber = byteNumber / FORMAT;
        if (kbNumber < FORMAT) {
            return new DecimalFormat("#.##KB").format(kbNumber);
        }
        double mbNumber = kbNumber / FORMAT;
        if (mbNumber < FORMAT) {
            return new DecimalFormat("#.##MB").format(mbNumber);
        }
        double gbNumber = mbNumber / FORMAT;
        if (gbNumber < FORMAT) {
            return new DecimalFormat("#.##GB").format(gbNumber);
        }
        double tbNumber = gbNumber / FORMAT;
        return new DecimalFormat("#.##TB").format(tbNumber);
    }
}

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